Lake Maslozero Ecosystem and the Results of the Release of the Smelt Osmerus eperlanus into the Lake

2021 ◽  
Vol 12 (3) ◽  
pp. 264-273
Author(s):  
N. V. Ilmast ◽  
O. P. Sterligova ◽  
Ya. A. Kuchko ◽  
A. N. Sharov ◽  
E. S. Savosin ◽  
...  
Keyword(s):  
Osmerus Eperlanus

scholarly journals Structural features of the mesonephros of semianadromous fish on the example of the European smelt (Osmerus eperlanus)

2021 ◽  
Vol 12 (1) ◽  
pp. 96-102
Author(s):  
E. A. Flerova
Keyword(s):  
Plasma Cells ◽  
General Scheme ◽  
Light And Electron Microscopy ◽  
Aquatic Organisms ◽  
Structural Features ◽  
The Body ◽  
Leningrad Region ◽  
Hematopoietic Tissue ◽  
Functional Features ◽  
Osmerus Eperlanus

At present, special attention is drawn to the study of the adaptation of aquatic organisms to a complex of environmental factors precisely at the cellular level. It is very important to study the structural and functional features of the kidney, which not only plays a key role in osmoregulation, but also makes a significant contribution to maintaining homeostasis at the level of functioning of a single nonspecific defense system of the body. In this aspect, the study of species belonging to a unique ancient group, united in the order salmoniformes, is highly relevant. Using the methods of light and electron microscopy, we investigated the morphology and ultrastructure of the mesonephros of the population of the semianadromous ecological form European smelt Osmerus eperlanus inhabiting the Gulf of Finland of the Baltic Sea and performing spawning migrations in the Luga River of the Leningrad Region. The general scheme of the trunk kidney organization is given, the structural features and the ratio of leukocytes and structures of the smelt nephron are revealed. It is shown that the development of hematopoietic tissue in the mesonephros, the number of mature forms of granulocytes are systematic signs which do not depend on the ecology of the species. The ratio of leukocytes, the width of the cisterns of the rough endoplasmic reticulum of plasma cells, the structure and number of granules in granulocytes are associated with the peculiarities of the functioning of the cellular link of the immune system under certain conditions of the species habitat. The ultrafine structure of the ion-transporting interstitial cells, as well as the ultrastructural features found in the smelt nephron, can be considered cytological markers of smelt adaptation to a semianadromous lifestyle.

BIOLOGICAL INVASIONS: THE EUROPEAN SMELT OSMERUS EPERLANUS (L.) AND THE MICROSPORIDIAN GLUGEA HERTWIGI WEISSENBERG, 1911

2021 ◽  
Vol 14 (4) ◽  
pp. 2-14
Author(s):  
L. V. Anikieva ◽  
E. P. Ieshko ◽  
O. P. Sterligova ◽  
Yu. S. Reshetnikov
Keyword(s):  
Dominant Species ◽  
Fish Community ◽  
Second Phase ◽  
Invasion History ◽  
Coregonus Albula ◽  
The Third ◽  
Third Phase ◽  
Population Outbreak ◽  
Osmerus Eperlanus ◽  
Latent Phase

The paper presents the phenomenology of the smelt Osmerus eperlanus and the microsporidian Glugea hertwigi invasion into a new habitat - Lake Syamozero (Karelia), where neither of the species occurred before. The invasion history falls into 4 phases. The first, latent phase started with a spontaneous invasion of the lake by smelt and lasted until the first fish showed up in catches (1968-1970). The second phase (1971 to 1980) was the invader number outbreak. The smelt became the dominant species in the fish community, while the native plankton-feeder, the vendace Coregonus albula, became an endangered species. The third phase (1980 to 1991) was the population outbreak of the microsporidian Glugea hertwigi, and development of an epizootic. The fourth phase (since 1991 until present) is the decreasing of the number of the invasive species - the smelt and the microsporidian Glugea hertwigi and the recovery of the native vendace population.

scholarly journals Temperature effects on egg and larval development rate in European smelt, Osmerus eperlanus , experiments and a 50 year hindcast

2020 ◽  
Vol 96 (6) ◽  
pp. 1422-1433
Author(s):  
Marieke Keller ◽  
Pieke Molenaar ◽  
Joep Leeuw ◽  
Wolf Mooij ◽  
Adriaan Rijnsdorp ◽  
...  
Keyword(s):  
Larval Development ◽  
Temperature Effects ◽  
Development Rate ◽  
Osmerus Eperlanus

On the origin of Solovetskaya vendace Coregonus albula and of the syamozero smelt Osmerus eperlanus

2009 ◽  
Vol 49 (1) ◽  
pp. 23-31
Author(s):  
N. V. Gordeeva ◽  
O. N. Kholod ◽  
G. A. Dvoryankin ◽  
D. S. Sendek ◽  
O. P. Sterligova
Keyword(s):  
Coregonus Albula ◽  
Osmerus Eperlanus

A novel fish herpesvirus of Osmerus eperlanus

Virus Genes ◽  
2010 ◽  
Vol 41 (1) ◽  
pp. 81-85 ◽  
Author(s):  
Nurith J. Jakob ◽  
Roland Kehm ◽  
Hans R. Gelderblom
Keyword(s):  
Osmerus Eperlanus

Isolation of picornavirus-like particles from the European smelt, Osmerus eperlanus (L.)

1990 ◽  
Vol 13 (2) ◽  
pp. 167-168 ◽  
Author(s):  
W. AHNE ◽  
K. ANDERS ◽  
M. HALDER ◽  
M. YOSHIMIZU
Keyword(s):  
Osmerus Eperlanus

Bimonthly progress of a non-lethal infection by Glugea hertwigi in young-of-the-year smelt, Osmerus eperlanus mordax

1969 ◽  
Vol 47 (5) ◽  
pp. 871-876 ◽  
Author(s):  
Claude Delisle
Keyword(s):  
Infection Rate ◽  
Critical Number ◽  
Lethal Infection ◽  
In Captivity ◽  
Young Of The Year ◽  
Osmerus Eperlanus

At regular intervals, during the summer of 1967, a total of 2923 smelts of age 0 were captured by means of the positive phototaxy shown by the young-of-the-year during night under artificial light.From June 22 to September 30, the Glugea hertwigi infection rate increased from 6.7 to 93.2%. The average number of Glugea cysts per specimen rose also from 0.08 to 57.44 during the same interval. The critical number of 250 Glugea cysts per specimen is not the only criteria of the lethal state of infection. Some young-of-the-year kept in captivity and having no apparent signs of Glugea infection enabled us to establish that Glugea cysts became apparent after 3 days of observation.

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